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Print 44 comment(s) - last by ghost49x.. on Mar 27 at 9:48 PM

No fuel cell vehicles from VW on the horizon

Source: Auto News





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The Real Problem is..
By maevinj on 3/22/2013 10:55:08 AM , Rating: 3
Lack of hydrogen fuel infrastructure.
Also isn't gasoline highly flamable?




RE: The Real Problem is..
By nshoe on 3/22/2013 12:00:18 PM , Rating: 2
quote:
Also isn't gasoline highly flamable?


Comparatively speaking, not really. Gasoline vapor is quite flamable, but the liquid itself is not easily flamable (to get an explosion with a gasoline tank you would need to heat the tank until the liquid was hot enough to quickly become a vapor, then ignite it - which is why cars don't explode when you rupture a fuel tank)

Look at it this way, at room temperature open a barrel of gasoline and throw a match on it and it will burn - do the same to a barrel of hydrogen and it will explode...


RE: The Real Problem is..
By Griffinhart on 3/22/13, Rating: 0
RE: The Real Problem is..
By nshoe on 3/22/2013 1:13:59 PM , Rating: 2
Perhaps you should read what I said. I did not say, leave it open and throw a match on it some time later. Nor was I referring to a leaky tank.

If you open a gas barrel and immediately throw a match on it it will burn but be extremely unlikely to explode. Do the same with an equivalent hydrogen barrel and the only way it is likely not to explode is if the rush of hydrogen coming out blows out the match before it can ignite the hydrogen.

So as I said, comparatively speaking, gasoline is not highly flamable when compared to hydrogen.


RE: The Real Problem is..
By ritualm on 3/22/2013 4:50:04 PM , Rating: 2
quote:
Actually, it probably wouldn't. Hydrogen being lighter than air would tend to leave the open barrel rapidly while gasoline vapors, being heavier than air, will linger. A leaky gas tank is a much larger fire danger than a leaky hydrogen tank. The biggest problem is that to store enough hydrogen to fuel a vehicle you need to use compressed gas cylinders or some other expensive or unproven method.

Hydrogen, with current technology, needs to be a pressurized gas. This is a problem, not just because of issues arising from rapid depressurization of the fuel tank, but also the volatility of the gas itself.

When was the last time hydrogen reacted with open air? You get the Hindenberg disaster. In a car, the best case scenario is the fuel tank stays relatively intact ... and that very rarely happens. A single leak from a gasoline-powered car isn't enough to destroy it and kill everyone onboard, as you also need an electrical spark or fire elsewhere. A single leak from a pressurized hydrogen gas tank gives you an explosion, destroying the entire car and killing everyone onboard.

This is why propane has a pungent smell added to the mixture - if you can smell it, get out of whatever you're in before you die to the leak going ablaze. Hydrogen as a fuel is more dangerous than THAT.


RE: The Real Problem is..
By lagomorpha on 3/23/2013 10:11:25 AM , Rating: 2
quote:
Look at it this way, at room temperature open a barrel of gasoline and throw a match on it and it will burn - do the same to a barrel of hydrogen and it will explode...


Fun fact: It's possible to flick a lit cigarette into a container of gasoline fast enough that it will put out the cigarette without the gas burning or exploding. I don't really want to know how this was first discovered and I'd rather not be around to see anyone try it.


RE: The Real Problem is..
By zephyrprime on 3/25/2013 11:47:46 AM , Rating: 2
This country has millions of rednecks that discovery things like this on a daily basis.


"And boy have we patented it!" -- Steve Jobs, Macworld 2007










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